diff --git a/src/main/java/com/ycwl/basic/controller/pc/DeviceV2Controller.java b/src/main/java/com/ycwl/basic/controller/pc/DeviceV2Controller.java
index d97ecf76..f90679af 100644
--- a/src/main/java/com/ycwl/basic/controller/pc/DeviceV2Controller.java
+++ b/src/main/java/com/ycwl/basic/controller/pc/DeviceV2Controller.java
@@ -3,8 +3,10 @@ package com.ycwl.basic.controller.pc;
 import com.ycwl.basic.integration.device.dto.config.*;
 import com.ycwl.basic.integration.common.response.PageResponse;
 import com.ycwl.basic.integration.device.dto.device.*;
+import com.ycwl.basic.integration.device.dto.status.DeviceStatusDTO;
 import com.ycwl.basic.integration.device.service.DeviceConfigIntegrationService;
 import com.ycwl.basic.integration.device.service.DeviceIntegrationService;
+import com.ycwl.basic.integration.device.service.DeviceStatusIntegrationService;
 import com.ycwl.basic.utils.ApiResponse;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
@@ -29,6 +31,7 @@ public class DeviceV2Controller {
 
     private final DeviceIntegrationService deviceIntegrationService;
     private final DeviceConfigIntegrationService deviceConfigIntegrationService;
+    private final DeviceStatusIntegrationService deviceStatusIntegrationService;
 
     // ========== 设备基础 CRUD 操作 ==========
 
@@ -144,6 +147,28 @@ public class DeviceV2Controller {
         }
     }
 
+    /**
+     * 根据设备ID获取设备在线状态
+     */
+    @GetMapping("/{id}/status")
+    public ApiResponse<DeviceStatusDTO> getDeviceOnlineStatus(@PathVariable Long id) {
+        log.info("获取设备在线状态, deviceId: {}", id);
+        try {
+            // 首先获取设备信息以获得设备编号
+            DeviceV2DTO device = deviceIntegrationService.getDevice(id);
+            if (device == null) {
+                return ApiResponse.fail("设备不存在");
+            }
+            
+            // 使用设备编号查询在线状态
+            DeviceStatusDTO onlineStatus = deviceStatusIntegrationService.getDeviceStatus(device.getNo());
+            return ApiResponse.success(onlineStatus);
+        } catch (Exception e) {
+            log.error("获取设备在线状态失败, deviceId: {}", id, e);
+            return ApiResponse.fail("获取设备在线状态失败: " + e.getMessage());
+        }
+    }
+
     /**
      * 创建设备
      */
diff --git a/src/main/java/com/ycwl/basic/integration/device/dto/status/DeviceStatusDTO.java b/src/main/java/com/ycwl/basic/integration/device/dto/status/DeviceStatusDTO.java
index 26807ab9..981f0a0a 100644
--- a/src/main/java/com/ycwl/basic/integration/device/dto/status/DeviceStatusDTO.java
+++ b/src/main/java/com/ycwl/basic/integration/device/dto/status/DeviceStatusDTO.java
@@ -6,6 +6,7 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 
 import java.time.LocalDateTime;
+import java.util.Date;
 
 /**
  * 设备状态信息
@@ -28,8 +29,8 @@ public class DeviceStatusDTO {
     /**
      * 最后活动时间
      */
-    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss'Z'")
-    private LocalDateTime lastActiveTime;
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
+    private Date lastActiveTime;
 
     /**
      * 最后动作（register/keepalive/unregister）
@@ -44,6 +45,6 @@ public class DeviceStatusDTO {
     /**
      * 状态更新时间
      */
-    @JsonFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss'Z'")
-    private LocalDateTime updateTime;
+    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
+    private Date updateTime;
 }
\ No newline at end of file
diff --git a/src/main/java/com/ycwl/basic/repository/DeviceRepository.java b/src/main/java/com/ycwl/basic/repository/DeviceRepository.java
index 8b6f3b5b..e18890bd 100644
--- a/src/main/java/com/ycwl/basic/repository/DeviceRepository.java
+++ b/src/main/java/com/ycwl/basic/repository/DeviceRepository.java
@@ -7,7 +7,9 @@ import com.ycwl.basic.model.pc.device.entity.DeviceConfigEntity;
 import com.ycwl.basic.model.pc.device.entity.DeviceEntity;
 import com.ycwl.basic.utils.SnowFlakeUtil;
 import com.ycwl.basic.integration.device.service.DeviceIntegrationService;
+import com.ycwl.basic.integration.device.service.DeviceStatusIntegrationService;
 import com.ycwl.basic.integration.device.dto.device.DeviceV2DTO;
+import com.ycwl.basic.integration.device.dto.status.DeviceStatusDTO;
 import com.ycwl.basic.integration.common.manager.DeviceConfigManager;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.redis.core.RedisTemplate;
@@ -33,6 +35,8 @@ public class DeviceRepository {
     public static final String DEVICE_CACHE_KEY = "device:%s";
     @Autowired
     private DeviceConfigIntegrationService deviceConfigIntegrationService;
+    @Autowired
+    private DeviceStatusIntegrationService deviceStatusIntegrationService;
 
     /**
      * 将DeviceV2DTO转换为DeviceEntity
@@ -57,6 +61,30 @@ public class DeviceRepository {
         return entity;
     }
 
+    /**
+     * 将DeviceV2DTO和DeviceStatusDTO合并转换为DeviceEntity
+     */
+    private DeviceEntity convertToEntityWithStatus(DeviceV2DTO deviceDto, DeviceStatusDTO statusDto) {
+        if (deviceDto == null) {
+            return null;
+        }
+        
+        DeviceEntity entity = convertToEntity(deviceDto);
+        
+        // 合并状态信息
+        if (statusDto != null) {
+            // Boolean转Integer: true→1, false→0
+            entity.setOnline(statusDto.getIsOnline() != null && statusDto.getIsOnline() ? 1 : 0);
+            entity.setKeepaliveAt(statusDto.getLastActiveTime());
+            entity.setIpAddr(statusDto.getClientIP());
+        } else {
+            // 默认离线状态
+            entity.setOnline(0);
+        }
+        
+        return entity;
+    }
+
     public DeviceEntity getDevice(Long deviceId) {
         log.debug("获取设备信息, deviceId: {}", deviceId);
         DeviceV2DTO deviceDto = deviceIntegrationService.getDevice(deviceId);
@@ -144,10 +172,31 @@ public class DeviceRepository {
     }
 
     public DeviceEntity getOnlineStatus(Long deviceId) {
-        if (redisTemplate.hasKey(String.format(DEVICE_ONLINE_CACHE_KEY, deviceId))) {
-            return JacksonUtil.parseObject(redisTemplate.opsForValue().get(String.format(DEVICE_ONLINE_CACHE_KEY, deviceId)), DeviceEntity.class);
-        } else {
-            return null;
+        log.debug("获取设备在线状态, deviceId: {}", deviceId);
+        try {
+            // 首先获取设备基本信息
+            DeviceV2DTO deviceDto = deviceIntegrationService.getDevice(deviceId);
+            if (deviceDto == null) {
+                log.warn("设备不存在, deviceId: {}", deviceId);
+                return null;
+            }
+            
+            // 通过设备编号获取设备状态
+            DeviceStatusDTO statusDto = deviceStatusIntegrationService.getDeviceStatus(deviceDto.getNo());
+            
+            // 合并设备信息和状态信息
+            return convertToEntityWithStatus(deviceDto, statusDto);
+            
+        } catch (Exception e) {
+            log.error("获取设备在线状态异常, deviceId: {}", deviceId, e);
+            // 降级处理：尝试仅返回设备基本信息
+            try {
+                DeviceV2DTO deviceDto = deviceIntegrationService.getDevice(deviceId);
+                return convertToEntityWithStatus(deviceDto, null);
+            } catch (Exception fallbackException) {
+                log.error("降级获取设备信息也失败, deviceId: {}", deviceId, fallbackException);
+                return null;
+            }
         }
     }